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A body moves with a speed of $10 {ms}^{- 1}$ due East. After 10 minutes, it moves
with a speed of $5 {ms}^{- 1}$ due West. The change in the velocity of the body

during this time interval is

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15 {ms}^{- 1}

due East

5 {ms}^{- 1}

due West

15 {ms}^{- 1}

due West

5 {ms}^{- 1}

due East

answer is D.

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Detailed Solution

Initial velocity (u)=

10 {ms}^{- 1}

due East =

+ 10 {ms}^{- 1}

Final velocity (v)= $5 {ms}^{- 1} due west = - 5 {ms}^{- 1}$

Change in velocity(v – u) = $- 5 {ms}^{- 1} - 10 {ms}^{- 1} = - 15 {ms}^{- 1} = 15 {ms}^{- 1} due west$

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